期刊
JOURNAL OF BUILDING ENGINEERING
卷 40, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jobe.2021.102315
关键词
Sustainable construction; Acoustical properties; Transmission loss; Clay; Hemp; Intensimetry; Mass law
资金
- ADEME
- Region Normandie
- DIRECCTE Normandie
- La Fondation de France
- Region Bretagne
- Le Ministere Francais de l'Education et de la Recherche
- La Fondation d'entreprise Legallais
- LABEX CeLyA of Universite de Lyon, France [ANR-10-LABX-0060]
This study demonstrates that the acoustic performance of light earth walls can be satisfactorily predicted using the Transfer Matrix Method computation. Additionally, it provides a good understanding of the physical phenomena occurring in biobased concretes and their relationship with the presence of coatings.
This paper focuses on the sound reduction of light earth at the wall scale. It aims at gaining knowledge and providing informations to professional building workers to help them in the acoustic optimization of biobased walls. Experimentations have been performed in controlled conditions using the intensimetry method, on 22 different samples to investigate thickness effect, wood frame effect, coating effect together with different light earth implementations (shuttering, spraying). These data were then confronted to two modelling approaches, the mass law estimate and a Transfer Matrix Method computation. It is shown that light earth performance can be satisfactorily predicted, whatever the wall configuration using the Transfer Matrix Method computation with isotropic elastic and porous layers. The study brings finally a good understanding of the physical phenomena occurring in biobased concretes, depending on the presence of coatings. For light earth, it also appears that mass law yields to a good approximation of the single-number rating for some configurations including at least one coating.
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